Drop down trailer hitch



FIG. 1 is a top, front, and right side perspective view of a fixed drop down trailer hitch showing my new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines in the drawings illustrate portions of the drop down trailer hitch that form no part of the claimed design. 

CLAIM The ornamental design for a drop down trailer hitch, as shown and described. 